角 - UI的路由器获取previous状态 [英] Angular - ui-router get previous state

问题描述

有没有办法来获得当前状态的previous状态？

Is there a way to get the previous state of the current state?

例如我想知道previous状态是当前状态B（其中previous状态本来状态的）之前。

For example I would like to know what the previous state was before current state B (where previous state would have been state A).

我无法找到它的UI路由器GitHub的文档页面。

I am not able to find it in ui-router github doc pages.

推荐答案

UI的路由器不跟踪previous状态一旦转换，但该事件 $ stateChangeSuccess 上广播 $ rootScope 时的状态变化。

ui-router doesn't track the previous state once it transitions, but the event $stateChangeSuccess is broadcast on the $rootScope when the state changes.

您应该能够从该事件赶上前状态（从是你要离开状态）：

You should be able to catch the prior state from that event (from is the state you're leaving):

$rootScope.$on('$stateChangeSuccess', function (ev, to, toParams, from, fromParams) {
   //assign the "from" parameter to something
});

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